What is the difference between a chart's version and appVersion?
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Quick Answer
version is the chart's SemVer (bump on any chart change); appVersion is the version of the app it deploys.
Detailed Answer
They move independently: you might fix a template bug (chart version 1.2.0 -> 1.2.1) without changing the app (appVersion 3.4.0). Templates often default image tags to .Chart.AppVersion. Always bump chart version on every change so releases are traceable.
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Interview Tip
Keep the two versions conceptually separate.
helmversioningsemver